US3853669A - Welding tip for plastic welding gun - Google Patents

Welding tip for plastic welding gun Download PDF

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US3853669A
US3853669A US00284232A US28423272A US3853669A US 3853669 A US3853669 A US 3853669A US 00284232 A US00284232 A US 00284232A US 28423272 A US28423272 A US 28423272A US 3853669 A US3853669 A US 3853669A
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body member
guide tube
welding
hollow body
tip
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US00284232A
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P Werstlein
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1788—Work traversing type and/or means applying work to wall or static structure

Definitions

  • the body member supports a 156/574 guide tube for slidably receiving plastic welding rod. [51] lint. Cl. B29c 27/02
  • the guide tube supports a pair of plates which in turn [58] Field 0t Search 156/433, 497, 499, 574, support a pressure roller.
  • the body member directs 156/579, 322, 306 hot air from the hot air welding gun to a lower end of the tip and the arrangement is such that a lower end of [56] References Cited a welding rod in the guide tube is softened for deposit UNITED STATES PATENTS in a weld seam.
  • the tip structure is of metal or other heat absorbing material for distributing heat to the 2 v.
  • the pressure R24301 3/1960 Kaminsky 156/497 roller has a concaved peripheral surface portion for FOREIGN PATENTS OR APPLICATIONS rolling out a smooth weld with the correct pressure.
  • thermoplastic material It is frequently desirable to join two or more pieces of thermoplastic material together in a permanent connection. In most instances it is desired that the juncture of such pieces be accomplished by a pleasing seam.
  • Plastic welding guns have heretofore been provided which utilize a hot stream of gas to fuse plastic for accomplishing the welding function, but the arrangement of feed means for the plastic and the tip constructions are such that it is extremely difficult for a worker to make a neat and strong seam. For example, in some the tip and also in their failure to provide means for properly smoothing the weld.
  • a welding tip is provided for a plastic welding gun which accomplishes an efficient softening of the welding rod at the weld seam and which includes a pressure roller positioned and shaped so as to most efficiently apply softened plastic into the weld seam.
  • a more particular object of the present invention is to provide a welding tip of the type described which utilizes a hollow body member of metallic construction having an integral connection with a metallic guide tube for welding rod, these members being arranged to maintain the heat supplied from a welding gun to the body member for preheating the welding rod, such members also being associated with an integral metallic frame portion supporting a pressure roller for smooth ing out the weld and applying correct pressure.
  • FIG. 1 is an elevational view of a plastic welding gun commonly in use
  • FIG. 2 is an enlarged fragmentary elevational view of the present welding tip mounted on a welding gun
  • FIG. 3 is a bottom view taken on the line 3--3 of FIG. 2;
  • FIG. 4 is a fragmentary view in cross section of a welded seam produced by the present tip.
  • the numeral designates a plastic welding gun presently in common use.
  • a plastic welding gun employs a handle portion 12 by means of which the gun may be gripped and manipulated.
  • the gun includes an electric heating element 14 and a blower or fan 16.
  • Electric lead wires 18 lead into the rearward end of the gun 10 and are suitably connected to the heating element 14 and the blower 16.
  • the gun 10 has suitable apertures 19 for the inlet of air which is forcefully moved through a nozzle 20 after first being heated.
  • the stream of gas which is ejected from the nozzle 20 is of sufficient heated temperature to soften a thermoplastic material for the purpose of forming a weld joint.
  • the present invention resides in the construction of a welding tip 22, FIGS. 2 and .3.
  • This tip includes a tubular body member 23 which is of a selected diameter so as to frictionally receive and be mounted on the end of the nozzle 20 of a welding gun.
  • the rearward end of the body member 23 is slotted at 24 to provide an effective frictional engagement on the nozzle, and a shoulder 25 is formed by a counterbored portion of the body member to limit inward positioning of the nozzle in the body member.
  • Secured integrally to the forward end of the body member 23 is a guide tube 26 arranged to receive a welding rod 28, such guide tube being open at both ends whereby the welding rod can be inserted from the upper end and project at its lower end to the point of weld.
  • the guide tube 26 extends at an acute angle from body member 23, and such arrangement is such that the welding rod will extend suitably to the point of weld with the tool held in an efficient welding position, namely, in about the angular position shown.
  • FIG. 3 shows the edge contour of the pressure roller 32.
  • the edge of the roller includes a pair of narrow flat surfaces 36 adjacent to the edges and a central concaved portion 38 between the flat surfaces.
  • Such shape of the roller surface forms a smooth weld seam 40, FIG. 4, between a pair of plates 42, or of course between other suitable members to be welded when the semi-liquid weld material is pressed down by the roller, the plates to be welded together having beveled edges 44 to receive the weld material.
  • the gun In a welding operation, the gun is drawn rearwardly, namely, from left to right as viewed in FIG. 2 wherein the softened plastic from the rod contained in the guide tube is urged into the weld seam and smoothened out by the pressure roller 32.
  • the present tool is made entirely from heat absorbing material, such as steel, whereby a substantial amount of the heat fed to the tool is retained in the tip.
  • heat absorbing material such as steel
  • Such an arrangement operates more efficiently to soften the welding rod adjacent to the lower end of the tip and to puddle the same for forming a good weld seam.
  • the structure of the tip causes the welding rod to be preheated toward the bottom of the guide tube 26 so that it will effectively soften at the discharge end of such guide tube.
  • Another important feature of the present invention resides in the lower end structure of the body member 23 and the guide tube 26. More particularly, the lower end portions of the body member 23 and the guide tube 26 are joined in a common wall, and a portion of such common wall is cut away. in a rearwardly tapered V-slot' 44, whereby hot air from the body member 23 is allowed to impinge against a portion of the welding rod above the bottom end of the guide tube 26, thus softening the welding rod for an improved presentation to the weld seam.
  • a welding tip is provided for plastic welding guns which forms a weld seam of very smooth characteristics.
  • the present tip makes it possible for the relatively unskilled workmen to do the job of a professional.
  • the welding rod 28 may be triangular as shown or round if desired.
  • the guide tube 26 will hold either shape.
  • a welding tip for plastic welding guns of the type having an outlet of heated gas for melting thermoplastic material to be used in a weld seam comprising a hollow body member arranged to receive heated gas from the welding gun, said hollow body member having a lower open end for discharging the heated gas, a
  • guide tube integral with said hollow body member at a forward portion thereof, said guide tube being integral with said hollow body member only at a lower portion thereof in a common wall structure, said guide tube leading upwardly from said body member above said common wall portion at an acute angle so as to be spaced forwardly of said body member through a greater portion of its length, said guide tube having open ends and being arranged to slidably guide a welding rod therethrough for presenting a portion thereof at the bottom to a weld seam at less than an acute angle under the influence of heated air from said body member, a portion of said common wall being cut away from the bottom between said body member and said guide tube to expose a lower portion of a welding rod above the lower end of the latter in said guide tube directly to heat from the hollow body member while still in the guide tube to preheat the rod, roller support means integral with said guide tube at a forward portion thereof, a pressure roller mounted on said roller support means in longitudinal alignment with said hollow body member and said guide tube and arranged to smoothen and press weld material softened by heated air from

Abstract

A welding tip for plastic welding guns having a hollow body member arranged for removable attachment to a hot air welding gun. The body member supports a guide tube for slidably receiving plastic welding rod. The guide tube supports a pair of plates which in turn support a pressure roller. The body member directs hot air from the hot air welding gun to a lower end of the tip and the arrangement is such that a lower end of a welding rod in the guide tube is softened for deposit in a weld seam. The tip structure is of metal or other heat absorbing material for distributing heat to the guide tube to preheat the welding rod. The pressure roller has a concaved peripheral surface portion for rolling out a smooth weld with the correct pressure.

Description

Unite States ten 11 1 r 1111 3,853,669 erstlein Dec. 10, 1974 WELDHNG TIP FOR PLASTIC WELDING 1,604,641 11/1970 Germany l56/497 GUN [76] Inventor: Peter F. Werstlein, 4620 NE. primay Fritsch Glison St, Portland, Oreg' 97213 Attorney Agent, or Fzrm-Eugene M. Eckleman 22 'l d: A 8 1 7 1 e 2 9 2 57 ABSTRACT [21] Appl' 284232 A welding tip for plastic welding guns having a hollow body member arranged for removable attachment to a [52] US. Cl 156/497, 156/306, 156/499, hot air welding gun. The body member supports a 156/574 guide tube for slidably receiving plastic welding rod. [51] lint. Cl. B29c 27/02 The guide tube supports a pair of plates which in turn [58] Field 0t Search 156/433, 497, 499, 574, support a pressure roller. The body member directs 156/579, 322, 306 hot air from the hot air welding gun to a lower end of the tip and the arrangement is such that a lower end of [56] References Cited a welding rod in the guide tube is softened for deposit UNITED STATES PATENTS in a weld seam. The tip structure is of metal or other heat absorbing material for distributing heat to the 2 v.
giggl 156/497 gulde tube to preheat the welding rod. The pressure R24301 3/1960 Kaminsky 156/497 roller has a concaved peripheral surface portion for FOREIGN PATENTS OR APPLICATIONS rolling out a smooth weld with the correct pressure.
818,066 8/1959 Great Britain 156/574 1 Claim, 4 Drawing Figures PATENTEUDEEIULQN WELDING TIP FOR PLASTIC WELDING GUN BACKGROUND OF THE INVENTION This invention relates to new and useful improve ments in welding tips for plastic welding guns.
It is frequently desirable to join two or more pieces of thermoplastic material together in a permanent connection. In most instances it is desired that the juncture of such pieces be accomplished by a pleasing seam. Plastic welding guns have heretofore been provided which utilize a hot stream of gas to fuse plastic for accomplishing the welding function, but the arrangement of feed means for the plastic and the tip constructions are such that it is extremely difficult for a worker to make a neat and strong seam. For example, in some the tip and also in their failure to provide means for properly smoothing the weld.
SUMMARY .OF THE INVENTION According to the present invention and forming a primary objective thereof, a welding tip is provided for a plastic welding gun which accomplishes an efficient softening of the welding rod at the weld seam and which includes a pressure roller positioned and shaped so as to most efficiently apply softened plastic into the weld seam.
A more particular object of the present invention is to provide a welding tip of the type described which utilizes a hollow body member of metallic construction having an integral connection with a metallic guide tube for welding rod, these members being arranged to maintain the heat supplied from a welding gun to the body member for preheating the welding rod, such members also being associated with an integral metallic frame portion supporting a pressure roller for smooth ing out the weld and applying correct pressure.
The invention will be better understood and additional objects and advantages will become apparent from the following description taken in connection with the accompanying drawings which illustrate a preferred form of the device.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of a plastic welding gun commonly in use;
FIG. 2 is an enlarged fragmentary elevational view of the present welding tip mounted on a welding gun;
FIG. 3 is a bottom view taken on the line 3--3 of FIG. 2; and
FIG. 4 is a fragmentary view in cross section of a welded seam produced by the present tip.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT Referring in particular to the drawings and first to FIG. 11, the numeral designates a plastic welding gun presently in common use. Such a gun employs a handle portion 12 by means of which the gun may be gripped and manipulated. The gun includes an electric heating element 14 and a blower or fan 16. Electric lead wires 18 lead into the rearward end of the gun 10 and are suitably connected to the heating element 14 and the blower 16. The gun 10 has suitable apertures 19 for the inlet of air which is forcefully moved through a nozzle 20 after first being heated. As is known in the art, the stream of gas which is ejected from the nozzle 20 is of sufficient heated temperature to soften a thermoplastic material for the purpose of forming a weld joint.
The present invention resides in the construction of a welding tip 22, FIGS. 2 and .3. This tip includes a tubular body member 23 which is of a selected diameter so as to frictionally receive and be mounted on the end of the nozzle 20 of a welding gun. The rearward end of the body member 23 is slotted at 24 to provide an effective frictional engagement on the nozzle, and a shoulder 25 is formed by a counterbored portion of the body member to limit inward positioning of the nozzle in the body member. Secured integrally to the forward end of the body member 23 is a guide tube 26 arranged to receive a welding rod 28, such guide tube being open at both ends whereby the welding rod can be inserted from the upper end and project at its lower end to the point of weld. As best seen in FIG. 2, the guide tube 26 extends at an acute angle from body member 23, and such arrangement is such that the welding rod will extend suitably to the point of weld with the tool held in an efficient welding position, namely, in about the angular position shown.
Secured integrally along an upper edge of guide tube 26, or in other words on the opposite side from the body member 23, are two plates or arms 30 supporting ashaft 34 at the lower end thereof. A pressure roller or wheel 32 is rotatably mounted on the shaft between the plates and such wheel is located in a predetermined position with relation to the positioning of the bottom end of the welding rod such that it rolls out the weld in a smooth seam with correct pressure. In this latter regard, particular reference is made to FIG. 3 which shows the edge contour of the pressure roller 32. More particularly, the edge of the roller includes a pair of narrow flat surfaces 36 adjacent to the edges and a central concaved portion 38 between the flat surfaces. Such shape of the roller surface forms a smooth weld seam 40, FIG. 4, between a pair of plates 42, or of course between other suitable members to be welded when the semi-liquid weld material is pressed down by the roller, the plates to be welded together having beveled edges 44 to receive the weld material.
In a welding operation, the gun is drawn rearwardly, namely, from left to right as viewed in FIG. 2 wherein the softened plastic from the rod contained in the guide tube is urged into the weld seam and smoothened out by the pressure roller 32.
Fonning an important part of the invention, the present tool is made entirely from heat absorbing material, such as steel, whereby a substantial amount of the heat fed to the tool is retained in the tip. Such an arrangement operates more efficiently to soften the welding rod adjacent to the lower end of the tip and to puddle the same for forming a good weld seam. The structure of the tip causes the welding rod to be preheated toward the bottom of the guide tube 26 so that it will effectively soften at the discharge end of such guide tube.
Another important feature of the present invention resides in the lower end structure of the body member 23 and the guide tube 26. More particularly, the lower end portions of the body member 23 and the guide tube 26 are joined in a common wall, and a portion of such common wall is cut away. in a rearwardly tapered V-slot' 44, whereby hot air from the body member 23 is allowed to impinge against a portion of the welding rod above the bottom end of the guide tube 26, thus softening the welding rod for an improved presentation to the weld seam.
In accordance with the present invention, a welding tip is provided for plastic welding guns which forms a weld seam of very smooth characteristics. Moreover,
the present tip makes it possible for the relatively unskilled workmen to do the job of a professional. The welding rod 28 may be triangular as shown or round if desired. The guide tube 26 will hold either shape.
It is to be understood that the form of my invention herein shown and described is to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the subjoined claims.
Having thus described my invention, I claim:
1. A welding tip for plastic welding guns of the type having an outlet of heated gas for melting thermoplastic material to be used in a weld seam, comprising a hollow body member arranged to receive heated gas from the welding gun, said hollow body member having a lower open end for discharging the heated gas, a
guide tube integral with said hollow body member at a forward portion thereof, said guide tube being integral with said hollow body member only at a lower portion thereof in a common wall structure, said guide tube leading upwardly from said body member above said common wall portion at an acute angle so as to be spaced forwardly of said body member through a greater portion of its length, said guide tube having open ends and being arranged to slidably guide a welding rod therethrough for presenting a portion thereof at the bottom to a weld seam at less than an acute angle under the influence of heated air from said body member, a portion of said common wall being cut away from the bottom between said body member and said guide tube to expose a lower portion of a welding rod above the lower end of the latter in said guide tube directly to heat from the hollow body member while still in the guide tube to preheat the rod, roller support means integral with said guide tube at a forward portion thereof, a pressure roller mounted on said roller support means in longitudinal alignment with said hollow body member and said guide tube and arranged to smoothen and press weld material softened by heated air from said hollow body member in a weld seam by drawing the roller thereover, said roller support means, said guide tube, and said hollow body member all being formed from a heat conducting material.

Claims (1)

1. A welding tip for plastic welding guns of the type having an outlet of heated gas for melting thermoplastic material to be used in a weld seam, comprising a hollow body member arranged to receive heated gas from the welding gun, said hollow body member having a lower open end for discharging the heated gas, a guide tube integral with said hollow body member at a forward portion thereof, said guide tube being integral with said hollow body member only at a lower portion thereof in a common wall structure, said guide tube leading upwardly from said body member above said common wall portion at an acute angle so as to be spaced forwardly of said body member through a greater portion of its length, said guide tube having open ends and being arranged to slidably guide a welding rod therethrough for presenting a portion thereof at the bottom to a weld seam at less than an acute angle under the influence of heated air from said body member, a portion of said common wall being cut away from the bottom between said body member and said guide tube to expose a lower portion of a welding rod above the lower end of the latter in said guide tube directly to heat from the hollow body member while still in the guide tube to preheat the rod, roller support means integral with said guide tube at a forward portion thereof, a pressure roller mounted on said roller support means in longitudinal alignment with said hollow body member and said guide tube and arranged to smoothen and press weld material softened by heated air from said hollow body member in a weld seam by drawing the roller thereover, said roller support means, said guide tube, and said hollow body member all being formed from a heat conducting material.
US00284232A 1972-08-28 1972-08-28 Welding tip for plastic welding gun Expired - Lifetime US3853669A (en)

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000643A2 (en) * 1977-07-22 1979-02-07 Drg (Uk) Limited Seaming plastics materials
US4204904A (en) * 1977-10-17 1980-05-27 Tabor Donald R Roofing material handling and sealing machine
US4338156A (en) * 1981-04-16 1982-07-06 Sand Robert H Glazing strip applicator tool
WO1986001770A1 (en) * 1984-09-11 1986-03-27 Aoberg Kjell Nozzle for hot gas welding of plastics
US4806194A (en) * 1988-03-07 1989-02-21 Wald Richard D Roofing paper applicator
US4855004A (en) * 1987-06-26 1989-08-08 Clements National Company Seam welding machine for thermoplastic material
US5656126A (en) * 1996-02-05 1997-08-12 Martinez; Leo Heat welding accessories
US5820718A (en) * 1996-12-26 1998-10-13 Pro Poly Of America, Inc. Liquid storage tank
US20030150547A1 (en) * 2002-01-08 2003-08-14 3M Innovative Properties Company Method of conforming a film to a surface
US6673294B2 (en) * 2000-03-21 2004-01-06 Saint-Gobain Vetrotex France S.A. Method for sealing a bared section of the wall of a hollow body made of a composite based on a reinforced thermoplastic
US20040094576A1 (en) * 2002-11-20 2004-05-20 Leo Martinez Heat nozzle for welding floor seams
US20040154266A1 (en) * 2000-09-25 2004-08-12 David Glanzman Apparatus and method for leak-proofing seams of synthetic fiber fabric items
US20070000606A1 (en) * 1999-01-25 2007-01-04 3M Innovative Properties Company Method of applying adhesive coated film
EP1832409A2 (en) * 2006-03-06 2007-09-12 GEPOC Verfahrenstechnik GmbH Method for manufacturing a thermoplastic hose
US20080000583A1 (en) * 2006-06-29 2008-01-03 3M Innovative Properties Company Adhering graphic films on irregular substrates
US20080142164A1 (en) * 2006-12-18 2008-06-19 Leo Martinez Heat welding nozzle for sealing flooring seams
US20080245471A1 (en) * 2007-04-05 2008-10-09 Curtis Goad Method and apparatus for lining process tanks
WO2010025687A1 (en) * 2008-09-04 2010-03-11 延锋彼欧汽车外饰系统有限公司 Hot wind bending welding machine for exterior decorative plastic parts of motorcars and a welding method thereof
CN102233675A (en) * 2010-04-28 2011-11-09 上海三槐科技有限公司 Welding method of aluminum-plastic overall-plastic composite flexible tube
CN103640210A (en) * 2013-12-02 2014-03-19 北京豪特耐管道设备有限公司 Welding tool and polyethylene material welding method
US20140091075A1 (en) * 2012-09-28 2014-04-03 Chao-Chih Liu Soldering device for plastics adhering
US8955711B2 (en) 2012-03-22 2015-02-17 Curtis Goad Liners and linings for tanks
US9278478B2 (en) 2007-04-05 2016-03-08 Curtis Goad Methods and apparatus for lining process tanks
US9759380B2 (en) 2012-03-22 2017-09-12 Curtis Goad Liners and linings for tanks and other liquid containment vessels
US9855732B2 (en) 1999-01-25 2018-01-02 3M Innovative Properties Company Method of applying adhesive coated film
US10138053B2 (en) 2007-04-05 2018-11-27 Curtis Goad Methods and apparatus for lining process tanks
US10392186B2 (en) 2012-03-22 2019-08-27 Curtis Goad Liners and linings for tanks and other liquid containment vessels
CN112829314A (en) * 2021-02-08 2021-05-25 中车青岛四方机车车辆股份有限公司 Welding nozzle of floor cloth welding gun, welding gun and method
US11376783B2 (en) 2018-10-31 2022-07-05 Curtis Goad Corner profiles and/or corner reinforcement for liners and linings suitable for use with tanks and other storage/containment vessels
US11396125B2 (en) 2019-04-19 2022-07-26 Goad Company Liners and methods of making liners

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US24801A (en) * 1859-07-19 Ambrose foster and noah sutton
GB818066A (en) * 1954-12-04 1959-08-12 Aug Schnakenberg & Co Bleibear Apparatus for the production of welded seams on thermoplastic synthetic materials
US3047050A (en) * 1959-06-19 1962-07-31 Sourber Earl Jacob Hot air welding apparatus
US3371188A (en) * 1965-08-25 1968-02-27 Henes Mfg Company Inc Electrically heated torch for elevating the temperature and directing the flow of a gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US24801A (en) * 1859-07-19 Ambrose foster and noah sutton
GB818066A (en) * 1954-12-04 1959-08-12 Aug Schnakenberg & Co Bleibear Apparatus for the production of welded seams on thermoplastic synthetic materials
US3047050A (en) * 1959-06-19 1962-07-31 Sourber Earl Jacob Hot air welding apparatus
US3371188A (en) * 1965-08-25 1968-02-27 Henes Mfg Company Inc Electrically heated torch for elevating the temperature and directing the flow of a gas

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000643A2 (en) * 1977-07-22 1979-02-07 Drg (Uk) Limited Seaming plastics materials
EP0000643A3 (en) * 1977-07-22 1979-06-13 Drg (Uk) Limited Seaming plastics materials
US4204904A (en) * 1977-10-17 1980-05-27 Tabor Donald R Roofing material handling and sealing machine
US4338156A (en) * 1981-04-16 1982-07-06 Sand Robert H Glazing strip applicator tool
WO1986001770A1 (en) * 1984-09-11 1986-03-27 Aoberg Kjell Nozzle for hot gas welding of plastics
US4855004A (en) * 1987-06-26 1989-08-08 Clements National Company Seam welding machine for thermoplastic material
US4806194A (en) * 1988-03-07 1989-02-21 Wald Richard D Roofing paper applicator
US5656126A (en) * 1996-02-05 1997-08-12 Martinez; Leo Heat welding accessories
US5820718A (en) * 1996-12-26 1998-10-13 Pro Poly Of America, Inc. Liquid storage tank
US9855732B2 (en) 1999-01-25 2018-01-02 3M Innovative Properties Company Method of applying adhesive coated film
US20070000606A1 (en) * 1999-01-25 2007-01-04 3M Innovative Properties Company Method of applying adhesive coated film
US9221237B2 (en) 1999-01-25 2015-12-29 3M Innovative Properties Company Method of applying adhesive coated film
US8608897B2 (en) 1999-01-25 2013-12-17 3M Innovative Properties Company Method of applying adhesive coated film
US6673294B2 (en) * 2000-03-21 2004-01-06 Saint-Gobain Vetrotex France S.A. Method for sealing a bared section of the wall of a hollow body made of a composite based on a reinforced thermoplastic
US20040154266A1 (en) * 2000-09-25 2004-08-12 David Glanzman Apparatus and method for leak-proofing seams of synthetic fiber fabric items
US20030150547A1 (en) * 2002-01-08 2003-08-14 3M Innovative Properties Company Method of conforming a film to a surface
US7141133B2 (en) 2002-01-08 2006-11-28 3M Innovative Properties Company Method of conforming a film to a surface
US20040094576A1 (en) * 2002-11-20 2004-05-20 Leo Martinez Heat nozzle for welding floor seams
US6871013B2 (en) * 2002-11-20 2005-03-22 Leo Martinez Heat nozzle for welding floor seams
EP1832409A2 (en) * 2006-03-06 2007-09-12 GEPOC Verfahrenstechnik GmbH Method for manufacturing a thermoplastic hose
EP1832409A3 (en) * 2006-03-06 2010-11-10 GEPOC Verfahrenstechnik GmbH Method for manufacturing a thermoplastic hose
US9339997B2 (en) 2006-06-29 2016-05-17 3M Innovative Properties Company Adhering graphic films on irregular substrates
US20080000583A1 (en) * 2006-06-29 2008-01-03 3M Innovative Properties Company Adhering graphic films on irregular substrates
US8778122B2 (en) 2006-06-29 2014-07-15 3M Innovative Properties Company Adhering graphic films on irregular substrates
US7571753B2 (en) * 2006-12-18 2009-08-11 Leo Martinez Heat welding nozzle for sealing flooring seams
US20080142164A1 (en) * 2006-12-18 2008-06-19 Leo Martinez Heat welding nozzle for sealing flooring seams
US9278478B2 (en) 2007-04-05 2016-03-08 Curtis Goad Methods and apparatus for lining process tanks
US10138053B2 (en) 2007-04-05 2018-11-27 Curtis Goad Methods and apparatus for lining process tanks
US8133345B2 (en) 2007-04-05 2012-03-13 Curtis Goad Method and apparatus for lining process tanks
US20080245471A1 (en) * 2007-04-05 2008-10-09 Curtis Goad Method and apparatus for lining process tanks
WO2010025687A1 (en) * 2008-09-04 2010-03-11 延锋彼欧汽车外饰系统有限公司 Hot wind bending welding machine for exterior decorative plastic parts of motorcars and a welding method thereof
CN102233675A (en) * 2010-04-28 2011-11-09 上海三槐科技有限公司 Welding method of aluminum-plastic overall-plastic composite flexible tube
US8955711B2 (en) 2012-03-22 2015-02-17 Curtis Goad Liners and linings for tanks
US9759380B2 (en) 2012-03-22 2017-09-12 Curtis Goad Liners and linings for tanks and other liquid containment vessels
US10392186B2 (en) 2012-03-22 2019-08-27 Curtis Goad Liners and linings for tanks and other liquid containment vessels
US9149981B2 (en) * 2012-09-28 2015-10-06 Chao-Chih Liu Soldering device for plastics adhering
US20140091075A1 (en) * 2012-09-28 2014-04-03 Chao-Chih Liu Soldering device for plastics adhering
CN103640210A (en) * 2013-12-02 2014-03-19 北京豪特耐管道设备有限公司 Welding tool and polyethylene material welding method
US11376783B2 (en) 2018-10-31 2022-07-05 Curtis Goad Corner profiles and/or corner reinforcement for liners and linings suitable for use with tanks and other storage/containment vessels
US11396125B2 (en) 2019-04-19 2022-07-26 Goad Company Liners and methods of making liners
CN112829314A (en) * 2021-02-08 2021-05-25 中车青岛四方机车车辆股份有限公司 Welding nozzle of floor cloth welding gun, welding gun and method
CN112829314B (en) * 2021-02-08 2022-05-31 中车青岛四方机车车辆股份有限公司 Welding nozzle of floor cloth welding gun, welding gun and method

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